That’s not to say Marx was entirely correct. His “dictatorship of the proletariat” didn’t quite work out as planned. But the consequence of this widening inequality is just what Marx had predicted: class struggle is back. Workers of the world are growing angrier and demanding their fair share of the global economy. From the floor of the U.S. Congress to the streets of Athens to the assembly lines of southern China, political and economic events are being shaped by escalating tensions between capital and labor to a degree unseen since the communist revolutions of the 20th century. How this struggle plays out will influence the direction of global economic policy, the future of the welfare state, political stability in China, and who governs from Washington to Rome. What would Marx say today? “Some variation of: ‘I told you so,’” says Richard Wolff, a Marxist economist at the New School in New York. “The income gap is producing a level of tension that I have not seen in my lifetime.”